From the Hebrew name אֱלִיָּהוּ ('Eliyyahu) meaning "my God is YAHWEH". Elijah was a Hebrew prophet of the 9th century BC, during the reign of King Ahab and his queen, Jezebel. The two Books of Kings in the Old Testament tell of his exploits, which culminate with him being carried to heaven in a chariot of fire.

Because Elijah was a popular figure in medieval tales, and because his name was borne by a few early saints (who are usually known by the Latin form Elias), the name came into general use during the Middle Ages. In medieval England it was usually spelled Elis. It died out there by the 16th century, but it was revived by the Puritans in the form Elijah after the Protestant Reformation.